What structure of a cell allows oxygen to pass?

What are the factors that affect the force of gravity between two objects?

Which of the following statements is true? A. Biodiversity provides additional resources that raise the carrying capacity of an ecosystem. B. Biodiversity increases an ecosystem's ability to withstand changes. C.

Glaciers can only form when

The outer layers of human skin are composed of dead cells impregnated with keratin and oil, which make the epidermis relatively impermeable to water, yet humans sweat freely in hot temperatures. This occurs because:

Many molecules are moved though the body by?

Using a broom to clean sidewalks and driveways is a way to reduce water pollution

From which location does seafloor spreading originate? mid-ocean ridges edges of continents deep-ocean trenches underwater volcanoes

What organ in the human body is like an organelle in a cell

Which phrase best defines erosion? A. cementing layers of rock together to form stone B. moving bits of rock and soil from one place to another C. layering bits of rocks and soil D. breaking up rocks into smaller pieces

How do living things respond to their environment? Provide 2 examples.